2008 Monitoring Report

R®u
John C. Brantley, Airport Director
RALEIGH-DURHAMAIRPORT AUTHORITY
1 0 0 0 Trade Drive • PO Box 8 0 0 0 1 • RDU Airport, NC 2 7 6 2 3
tel: [phone] • Fix (91 9) 840-0175 • www.rdu.conn
CERTIFIED MAIL: 7006 2150 0003 3594 8153
February 24, 2009
Attn: Central Files
NC DENR- Division of Water Quality
1617 Mail Service Center
Raleigh, NC 27699-1617
Re: NPDES 2008 Annual Report
NPDES Permit No. NCO084514
Raleigh-Durham Airport Authority
OWi ju"L
DEN R - VJATE R 0 UALITY
POINT SOURCE BRANCH
The Raleigh-Durham Airport Authority ("Authority") respectfully submits an original and one
copy of the calendar year 2008 Annual Report, in accordance with NPDES Permit No.
NC0084514. Enclosed are the visual monitoring reports, total glycol and urea usage data and
nitrogen loading information.
Historical data that indicates certain parameters either no longer need sampling or are reduced in
the number of sampling events per year are also included. These findings are based on the
Authority's NPDES permit. A summary of the findings are below with the appropriate permit
footnotes and sections referenced for your convenience.
- Total Suspended Solids will now be collected annually at Outfalls 002 (footnote 2 of A(2)),
004 (footnote 2 of A(4)) and 016 (footnote 2 of A(6)).
- Oil and Grease will be collected annually at Outfall 016 (footnote 3 of A(6)).
- Benzene, Toluene, Ethylbenzene and Total Xylenes (BTEX) will be discontinued at Outfalls
003 (footnote 4 of A(3)) and 016 (footnote 4 of A(6)).
- Dissolved Oxygen and Propylene Glycol will be collected annually at Outfall 004 (footnote
5 of A(4)) and Propylene Glycol sampling will be discontinued at Outfall 002 (footnote 6 of
A(2)).
- Acute Toxicity will be reduced to annual sampling at Outfalls 003 (footnote 6 of A(3)), 007
(footnote 5 of A(5)) and 016 (footnote 5 of A(6)).
Additionally, the Authority respectfully requests clarification on what a discharge event entails.
Internal notes from previous employees indicate that a qualifying discharge event, for quarterly
samples, must have 72 hours of dryness (no precipitation) beforehand and that the discharge
WAKE COUNTY DURHAM RALEIGH DURHAM COUNTY
Michael A. Weeks, Chairman Robert D. Teer, Jr., Vice -Chairman Kim D. Frazier, Secretary Craigie D. Sanders
Terry K. Yeargan Tonita F. Lipscomb, Treasurer David T. Clancy W. Stephens Toler

must be at least 0 10 inches of precipitation For glycol, urea and acute toxicity sampling events,
there are no such restrictions Please verify if these internal guidelines are accurate The NPDES
permit does not state such parameters, nor were they found on the DENR DWQ website
If you have any questions, please contact me by phone at [phone], or by e-mail at
gma damson@rdu com
Sincerely,
1
� l
I
/ ,J 4
ma Damson
Environmental Program Manager
Raleigh-Durham Airport Authority
Enclosures

2008 Visual Monitoring Reports, NPDES Permit No. NCO084514
Raleigh-Durham International Airport
Outfall
Spring
Date
Stormwater Discharge Characteristics
Color
Odor
Clarity
Floating
Solids
Suspended
Solids
Foam
Oil Sheen
Other
Comments
001
05/14/08
orange brown
none
poor
bark
trees
none
No
No
Frogs, birds, cardinal insects
002
1 05/14/08
orange brown
none
murky
pet s, see
pods
log
No
No
trash
Shells on shore, geese
003
05/14/08
clear
none
excellent
petals, leal,
feathers
none
No
No
trash
birds, insects
004
05/14/08
light brown
none
fair
leaves
branches
No
No
No
Frogs, birds cardinal, insects
007
05/14/08
clear
none
excellent
none
algae, moss
No
No
trash
geese, fish, tadpoles
008
05/14/08
no water
none
N/A
N/A
N/A
N/A
N/A
Trash
Muddy
016
05/14/08
clear
none
Fair
plants
moss algae
No
No
No
steady flow, insects
H
05/14/08
clear
none
good
leaves
branches
No
No
Film
Still water
I
05/14/08
brown
none
poor
leaves
algae, moss
No
No
No
Frogs, birds, insects
P
05/14/08
brown
none
poor
seeds
none
Very little
No
No
Frogs birds insects, geese
S
05/14/08
brown
none
good
leaves
none
No
No
trash
Insects
Y
05/14/08
clear
none
good
grass stems
none
No
No
No
Low flow
UU
05/14/08
brown
none
poor
grass
none
No
Yes
No
Low flow
KK
05/14/08
orange
none
fair
none
none
No
Yes
Film
Very low flow
JJ
05/14/08
clear
none
excellent
none
none
No
No
No
Flowing
II
05/14/08
clear
none
excellent
none
none
No
No
No
T Flowing
Stormwater Discharge Characteristics
Floating
Suspended
Outfall
Fall Date
Color
Odor
Clarity
Solids
Solids
Foam
Oil Sheen
Other
Comments
eaves,pine
needles,
low flow, beaver dams, frog, ducks birds,
001
11/21/08
green
none
poor
vegetation
none
none
none
none
animal scat
002
11/21/08
light brown
none
poor
none
none
present
none
none
birds, ducks
003
11/21/08
light brown
none
fair
vegetation
none
none
none
none
calm, ducks
eaves, pine
004
11/21/08
light brown
none
murky
needles
none
none
none
none
deer
greens
007
11/21/08
brown
none
fair
vegetation
none
none
none
turtle, trash
ducks birds
008
11/21/08
brown
none
N/A
N/A
N/A
N/A
N/A
trash
muddy, no flow
eaves, pine
016
11/21/08
brown
none
good
needles
none
present
none
none
steady flow, birds
eaves
H
11/21/08
clear
none
good
vegetation
none
none
none
bubbles
calm
algae, leaves,
I
11/21/08
brown
none
fair
vegetation
none
none
none
none
calm, water level near top of opening, deer
eaves,
P
11/21/08
brown
none
fair
vegetation
none
none
none
none
calm water level near top of opening, bird
leaves pine
leaves, pine
small
S
11/21/08
clear
none
good
needles
needles
none
droplets
large crawfish
calm
Y
11/21/08
clear
none
good
seeds
none
none
none
none
steady flow
vegetation
UU
11/21/08
light brown
decay
good
seeds
vegetation
none
none
gel -like film rings
low flow
oranges
eaves, pine
KK
11/21/08
brown
none
good
needles
none
none
present
none
low flow hawk
leaves, pine
needles,
11
11/21/08
light brown
none
good
vegetation
none
none
none
none
low flow
eaves, pine
II
11/21/08
clear
I none
I good
needles
none
none
I none
none
low flow

Raleigh-Durham Airport Authority
Total Glycol and urea Usage - Calendar Year 2008
NPDES Permit NC0084514
Note: Only months with Glycol and/or Urea usage are reported.
All measurements are in gallons.
Propylene Gylcol
Ethylene
Total Glycol
Urea
Year
Month
Type I
Type IV
Glycol
(gallons)
(gallons)
2008
Jan
14,543
1,165
1,602
17,310
0
2008
Feb
8,885
75
0
8,960
0
2008
Mar
1,955
0
0
1,955
0
2008
April
567
0
`0
567 .:
0
2008
Oct
3,775
0
0
3,775
0
2008
Nov
4,779
90
0
4,869
0 `
2008
Dec
6,714
0
0
6,714
0
Note: Only months with Glycol and/or Urea usage are reported.
All measurements are in gallons.

NPDES 13 Nitrogen Loading
Raleigh-Durham International Airport, NPDES Permit No. NCO084514
Calculated Nitrogen Loadings
2008
1
2
Quarter
3
4
Date Sampled
Number of Representative Rain Events 10
10
14
10
Average Precipitation 0 686
053
0778571429
0 477
Estimated Nitrogen Load for Quarter 961 04
1,209 23
1,37909
1,951 43
Estimated Nitrogen Load for Year, Pounds
5,50079
2/12/2009 Page 1 of 1

Stormwater Effluent Monitoring Results
NPDES Permit NC0084514 (effective 7/1/08, expires 2/28/13)
Mean = 42 23 27
Max = 145 53 60
Outfalls 002, 004 & 016 - After 8 consecutive samples, reduce frequency to annually unless
mean of sample results >100 mg/I or any one sample result >150 mg/I.
Total Suspended Solids (m /1)
Sample
Outfall
Date 001
002
003
004 007
016
11/16/2006
30.0
25.2
18.4
36.0
1/18/2007 21
145
14
53 4
14
8/27/2007
16
12
4.0
6.0
10/25/2007
28
38
28
23
1/11/2008 26
25
12
4.2 7.7
26
5/28/2008
43
10
14
60
9/10/2008
39
11
28
19
11 /4/2008
11
13
31
29
Mean = 42 23 27
Max = 145 53 60
Outfalls 002, 004 & 016 - After 8 consecutive samples, reduce frequency to annually unless
mean of sample results >100 mg/I or any one sample result >150 mg/I.

Stormwater Effluent Monitoring Results
NPDES Permit NC0084514 (effective 7/1/08, expires 2/28/13)
Max
Daily max limit = 45.0 mg/I
3.57
Outfall 016 - After 8 consecutive samples, reduce frequency to annually if no results >45 mg/I.
Oil & Grease (m /1)
Sample
Date 001
Outfall
002 003 004
007 016
11/16/2006
<5.0
1/18/2007 <7
7 <6 <6
<6 <6
8/27/2007
<5
10/25/2007
3
1/11/2008 3.40
4.96 3.24 <3.00
<3.00 3.57
5/28/2008
<3.00
9/10/2008
<3.00
11/4/2008
<3.00
Max
Daily max limit = 45.0 mg/I
3.57
Outfall 016 - After 8 consecutive samples, reduce frequency to annually if no results >45 mg/I.

Stormwater Effluent Monitoring Results
NPDES Permit NCO084514 (effective 7/1/08, expires 2/28/13)
Max = 1.1 0.00
Benzene (ug/1)
Sample
Date
Sample Date
001
002
Outfall
003
004
007 016
8/23/2005
<1
<1
<1
<1
<1
11/10/2005 <1 <1
<1
2/22/2006
<1
<1
<1
<1
7777
4/3/2006 <1 <1
<1
7/6/2006 <1 <1<1
<1.0
11/16/2006 <1 <1
<1.0
1/18/2007
<1.0
<1.0
<1.0
<1.0
8/27/2007 <1.0 <1.0
<0.17
10/25/2007 <0.12 <0.12
1/11/2008
<0.12
<0.12
<0.12
<0.12
11/4/2008 <0.20
<O.12
5/28/2008 1.1 <0.20
9/10/2008 <0.20
11/4/2008 <0.20
Max = 1.1 0.00
0.00 Max = 8.7 0.00
Eth (benzene (ug/1)
Sample
Date
001
002
Outfall
003 004
007 016
8/23/2005
<1
<1
<1 <1
<1
<1
11/10/2005 <1 <1
2/22/2006
<1
<1
<1 <1
<1
5.70
4/3/2006 <1 <1
<1
7/6/2006 <1 <1 <1
11/16/2006 <1 <1
<1
1/18/2007
<1.0
<1.0
<1.0
1/18/2007
<1.0
8/27/2007 <1.0 <1.0
10/25/2007 0.33 <0.17
1/11/2008
<0.17
<0.17
<0.17 <0.17
<0.17
5/28/2008 8.7 <0.20
<0.15
9/10/2008 <0.20
<0.15
11/4/2008 <0.20
<0.15
5/28/2008 19 <0.20
9/10/2008 <0.20
11/4/2008 <0.20
0.00 Max = 8.7 0.00
Max = 19 0.00
0.00
0.00
Toluene (ug/1)
Sample
Date
Sample Date
001 1
002
Outfall
003
004
007 016
8/23/2005
<1
<1
<1
<1
<1
11/10/2005 <1 <1
5.84
2/22/2006
<1
5.70
<1
<1
7/6/2006 <2 <2 <2
4/3/2006 <1 <1
<1
7/6/2006 8.44 <1 <1
<2.0
11/16/2006 <1 <1
<2.0
1/18/2007
<1.0 1
1.3
<1.0
<1.0
8/27/2007 <1.0 <1.0
<0.21
10/25/2007 <0.15 <0.15
1/11/2008
<0.15
<0.15
<0.15
<0.15
11 /4/2008 <0.67
<0.15
5/28/2008 19 <0.20
9/10/2008 <0.20
11/4/2008 <0.20
Max = 19 0.00
0.00
0.00
Max = 69 0.00
0.00
Outfalls 002 & 003 - After 8 consecutive samples, reduce frequency to annually if no results for any BTEX parameter exceeds the water quality standard for that parameter, and
discontinue sampling BTEX at this outfall if results show no detections above the practical quantitation limit.
Outfall 016 - After 4 consecutive samples, discontinue sampling BTEX at this outfall if results show no detections above the practical quantitation limit.
Surface Water Quality Standards: (Ref: NC DENR Division of Water Quality, NC and EPA Criteria Table, Sept. 3, 2008, http://h2o.enr.state.nc.us/csu/documents/NC_EPA_Standards_CriteriaTables9-03-08.pdf)
Benzene = 51 ug/I
Ethylbenzene = 97 ug/I
Toluene = 11 ug/I
Xylenes, mixture = 670 ug/I
Xylenes, Total (ug/1)
Sample
Date
001
002
Outfall
003 004
007 016
8/23/2005
<2
<2
<2 <2
<2
11/10/2005 <2 <2
2/22/2006
<2
5.84
<2 <2
4/3/2006 <2 <2
<2
7/6/2006 <2 <2 <2
11/16/2006 <2 <2
1/18/2007
<2.0
1 18.6
<2.0
<2.0
8/27/2007 <2.0 <2.0
10/25/2007 2.3 <0.21
1/11/2008
<0.21
<0.21
<0.21 <0.21
<0.21
5/28/2008 69 <0.67
9/10/2008 <0.67
11 /4/2008 <0.67
Max = 69 0.00
0.00
Outfalls 002 & 003 - After 8 consecutive samples, reduce frequency to annually if no results for any BTEX parameter exceeds the water quality standard for that parameter, and
discontinue sampling BTEX at this outfall if results show no detections above the practical quantitation limit.
Outfall 016 - After 4 consecutive samples, discontinue sampling BTEX at this outfall if results show no detections above the practical quantitation limit.
Surface Water Quality Standards: (Ref: NC DENR Division of Water Quality, NC and EPA Criteria Table, Sept. 3, 2008, http://h2o.enr.state.nc.us/csu/documents/NC_EPA_Standards_CriteriaTables9-03-08.pdf)
Benzene = 51 ug/I
Ethylbenzene = 97 ug/I
Toluene = 11 ug/I
Xylenes, mixture = 670 ug/I

Stormwater Effluent Monitoring Results
NPDES Permit NC0084514 (effective 7/1/08, expires 2/28/13)
Min = 4.34 4.03 5.82 5.70 5.05
Outfalls 001, 004 & 007 - If after a minimum of 6 samples over a minimum of 2
consecutive seasons DO is not reported <5 mg/I, reduce frequency of DO and
propylene glycol sampling to annually.
Results in red indicate that Glycol was not sampled
Dissolved Oxygen (m
/1)
Sample
Date
001
002
Outfall
003
004
007 016
1/6/2006
5.1
9.6
5.27
8.93
7.45
2/22/2006
5.75
5.04
9.16
5.70
1/18/2007
11.5
12.35
8.37
11.34
10.36 10.71
2/1/2007
11.76
8.54
9.14
9.56
8/27/2007
i.00
; . ki
10/25/2007
8.73.6�'
7.45
1/11/2008
7 ?A
6 'i C,X9.23
1/17/2008
4.80
8.76
6.24
5.84
1/30/2008
4.34
5.87
5.97
5.82
2/22/2008
4.98
4.03
5.90
6.49
11/4/2008
8.77
9.53
8.18
9.68
8.57 9.56
Min = 4.34 4.03 5.82 5.70 5.05
Outfalls 001, 004 & 007 - If after a minimum of 6 samples over a minimum of 2
consecutive seasons DO is not reported <5 mg/I, reduce frequency of DO and
propylene glycol sampling to annually.
Results in red indicate that Glycol was not sampled

Stormwater Effluent Monitoring Results
NPDES Permit NC0084514 (effective 7/1/08, expires 2/28/13)
Outfalls 001, 004 & 007 - If after a minimum of 6 samples over a minimum of 2 consecutive seasons DO is not reported <5 mg/I, reduce frequency of DO and propylene
glycol sampling to annually.
Outfall 002 - After 4 consecutive samples, discontinue sampling propylene glycol at this outfall if results show no values above the practical quantitation limit.
Ethylene
Glycol (m
/1)
001
Sample
Date
001
002
Outfall
003 004
007 016
1/6/2006
11.8
<1.00
42.3
<1.00
<1.00
1/18/2007
2/22/2006 13.5 44.1 <1.00
<1.00
1/18/2007
ND
ND
1,870
ND
ND
<1.0
2/1/2007 98.9 36.9 <1.0
23.0
1/17/2008
<1.0
<1.0
40.6
<1.0
<1.0
11/4/2008 7.1
1/30/2008 <1.0 <1.0 33.6 137
2/22/2008 <1.0 1.4 <1.0
<1.0
11/4/2008 <1.4
<1.4
Outfalls 001, 004 & 007 - If after a minimum of 6 samples over a minimum of 2 consecutive seasons DO is not reported <5 mg/I, reduce frequency of DO and propylene
glycol sampling to annually.
Outfall 002 - After 4 consecutive samples, discontinue sampling propylene glycol at this outfall if results show no values above the practical quantitation limit.
Propylene Glycol (mg/1)
Sample
Date
001
002
Outfall
003 004
007 016
1/6/2006
1.72
<1.00
<1.00 <1.00
<1.00
2/22/2006 <1.00 <1.00 2.68 <1.00
<1.00
1/18/2007
ND
ND
ND 60.6
ND
2/1/2007 85.6 41.7 <1.2
22.2
1/17/2008
<1.0
<1.0
382 <1.0
1/30/2008 <1.0 <1.0 283 238
2/22/2008 <1.0 <1.0 <1.0
<1.0
11/4/2008 7.1
<1.6
Outfalls 001, 004 & 007 - If after a minimum of 6 samples over a minimum of 2 consecutive seasons DO is not reported <5 mg/I, reduce frequency of DO and propylene
glycol sampling to annually.
Outfall 002 - After 4 consecutive samples, discontinue sampling propylene glycol at this outfall if results show no values above the practical quantitation limit.

Stormwater Effluent Monitoring Results
NPDES Permit NC0084514 (effective 7/1/08, expires 2/28/13)
Outfall 003 - After 4 consecutive samples, reduce frequency to annually if acute
toxicity is not shown to exist.
Outfalls 007 & 016 - After 5 consecutive samples, reduce frequency to annually
if acute toxicity is not shown to exist
Acute Toxicity (%)
Sample
Date
001
002
Outfall
003 004
007
016
1/18/2007
>100%
>100%
70.7% >100%
>100%
>100%
8/27/2007
>100%
>100%
>100%-
10/25/2007
>100%
>100%
>100%
1/11/2008
>100%
>100%
>100%
>100%
>100%
1/17/2008
>100%
>100%
>100% >100%
9/10/2008
>100%
>100%
>100%
11/4/2008
>100%
>100%
>100%
Outfall 003 - After 4 consecutive samples, reduce frequency to annually if acute
toxicity is not shown to exist.
Outfalls 007 & 016 - After 5 consecutive samples, reduce frequency to annually
if acute toxicity is not shown to exist